Heat regulator



HEAT REGULATOR Filed May 2, 1925 5 Sheets-Sheet Aug. 21, 1928.

' c. H. HAPGOOD HEAT REGULATOR Filed May 1925 5 Sheets-sheet s ante-11b1iflmez/vcz b. bi 60012 Aug. '21, 1928. 1 1,681,640 C. H. HAPGOOD HEATREGULATOR Fi led May 1925 5 Sheets-Sheet 4 Aug. 21, 1928. 1,681,640

C. H. HAPGOOD HEAT REGULATOR Filed May 1925 5 Sheets-Sheei 5 J 7 J30 1 l703 5 m :2- p a v 72 X i I a in 7;

3144mm! oz /fl Q I attorney,

Patented Aug 21, 1928.

UNITED m CLARENCE H. HAPGOODQOF' TOLEDO; 011 0, ASSIGKORQBY MESNE-ASSIGNMENTS, TO

- 211113 c; n. c. 00., 05 TOLEDO, omo, xconrom'rron or 0x10; 17

BELT REGULATQR This invention relates to automatic, regulators for theheating devices of dwellings, factory buildings, boats and the like,Whereby the interior of such dwellings, etc anay be maintainedsfibstantiallyat" axpiiecleter minedtempefature; I a v x l The principalobject of my invention is the ;p17ovision off afl'th eimostatically conAnother object of my im' ention js the arrangement of thethermostaticControl whereby it Willwmove the valve toavaligl v I v V assoclatedfmeehanlsmqshownlinFi' .10. f t

closed positionqnntil the valve. .i'eaches; its

umaxinnun Closed position wherein only eiiff ficientqfuel i s pernntteclto pass to mai'ntairnapilot light, ancll thereupon further 'movement ofthe thermostatic.eontrol will not efi ect further,clos ingt ofthe alve]l "A. further object of my intention is (the provision of manuallyacljilstahle man ion varying the extent of actionof the thei x'nostaticcontrol, whereby varions zdegrees of heat maybe maintained in anydesired 10w tion. A

(Jther objects and] advantages will, be apT parentfrom thefollowingfglecriptionl, wherein reference is elnacle to the. accomvzxnyingdrawingsillustrating preferred embodiments of 'lny i nvention and wherein;si.n1ilar reference tnu l nei'ale designate similar partsthroughout-the several fvi ws RInthe drawings I -Fig. 1 is afronteletqatlon of a furna ce' equipped with a thel'mostaticallycontrolled device .for heating; the interior of a dwell} ng, parts beingbpoken' away; and a Sl'lOWIl iseetion. j l 1 Fig. Zis an enlarged frontelevationof the thermostat and associated elements/m Fig.1 '3 is abottom plan view of. the parts" shown in'Fig. 2. t r V 4 is aneenlargeddetail View showing the mounting of one of the levers connect- M lValve.

w Referring now ing adjacent bars of the thermostat, fp'arts belngljrokenaway and shown ilifeeetion. 1

I 5: 'sa plan View of'the'elements shojvfiinFiggfL Figg'fi' is a plan viewand Fig. 7 affront elevation of the [free extremity of the lower alevel- I of the theirnostat "andfthe' meehanlnl earfiedl thereby foradjusting the position l of the' nbhonconnecting thelever Withthe 1 Ithermostaticallycontrolled Valve. 1

Fig; 8' is a' detail perspective V116? of one of the torners' of thethermostat frame.

F 9 is anienlarged detail. viewof the,

'thei'mostatically controlled "valve and ac lja' cent parts. t 7

1 1g. 10 1s a plan vlew ofthe valve anrl "jlfiig. ll is a Verticalseotiontaken snbtaiifmay am line 11%11 of Fig. 10.

I 12 isfa cletail erosils section taken Stantmflly' ongthe 1i1 1e '12-%-12of Fig, 10. i j

1 715 .113; is; an jend View of the valvel and Fig? 141% side elevationand w ig. :15 a bottom planfv inv "of one of tljetepulleysntili zed forchangin the angle of travel of the i ibhoh eonnecting the thermostat"with the inodifi ed ffo iim of fth'ei thermostatic" eontlpl h i m ii' d(w h, a d r nt adjustin means.

Fig.117;ieanlendjtzieiv of thelower i lever lever) and associatedelements, and

furnace ofithe hot'lair" type,'fbut itjis to be the 1 a 1 JUL)llund'erstoocl thatjjmy invel ltioiil ad'aptedfor i use, wit'hlothertypesibf armee'stoves, we i such as. the'luslialfhot water; steam f 01vapor syfi s. a The l ieated(air, hot water, etc; v'fro'nathe furnace isadapted to heatthe varil 01 1s roome ofvthejhu ilding in asualrjnan Inor of heating devices, and the particular construct-ionjof the furnaceradiators, etc. forms no part of the presentinvention'. A

. thermostat 8 is arranged in one or more oi the rooms of the buildingtobe heated, as

for examplein-the living room 9 of adwell- As herein shown thethermostat compr ses a frame having side pieces 10 otwo'od 9 ing.

or other relatively non -expansiblematerial and spaced cross bars 11 atthefupper and lower extremities of the side pieces, as best illustratedembodiment one/of the metallic.

shown" in Figs. 2 and S; The spaced'cross bars 1 1 areutilized assupports "for bearings for levers connectin the ends of adjacentsections of metallic rods-or otherrelatively expansjible inaterials'forming the heat responsive elements of the thermostat; In therods-12ispivoted adjacent t it rs tremity by means'ot a knifeedge iv tbearing upon the upper faces of the spaced upper cross bars 11, andextends downward in a Substantially vertical direction to the" lowerextremity of the thermostat frame,

where its lower extremity is connected'to one arm of the connectinglever 14:. The lever l t is fulcrumed intermediate its ends 'by means ofthe knife edge pivot 15 'upona o to the upper extremity of thethermostat frame, where it is connected with the lever 18ifulcrumedintermediate its ends *jupon bearings 19carried'by the uppercross' bars fll. It'will thus be seenthat' the expansion or contractionof the metalliorod 12 will serveto swing the, lever 14 on its pivot andsuch motion will be transmitted to themetallicirod 17. In addition thisrod 17 :will expand or contract simultaneously with the rod 12, with theresult that substantially g 7 v H '34: to the periphery of which issecured the upper extremity of the ribbon connecting twice as muchmovement will beimparted to the lever l8 connecting the up er extremity?of the r'odl? with the nextadjacent "rod 2'0.

- ment to thevendmost rod 21 to swing-the multiplying lever 22asuflicientjdistance to operate the ,thermotsatically controlled valve23 when the temperatureiin theroom varies a sufiicient number ofdegrees. Preferably I desire the thermostat to be responsive torelatively small changes in temperature, 1 as As many metallic rods maybe arranged j with their extremities connected by levers -fulcrumed onthe cross barsll as may be found necessary to impart suilicientmoveforexample changesof five to ten degrees,

7 and I have found in practice that thisre'sultis accomplishedby means'ofa thermostat constructed substantially in accordance with :thatillustrated in Figs, 1 and 2. 'Itwill be understood that the metallicrods of the thermostat may be formed "of more than one material, or maybe relatively thin riblocus or wires; This term is meant to in- .cludeany metallic'heat responsive element or combination of elements whichwill ex-, pand and contract duringchanges in the temperaturev ofthejsurrounding atmosphere andrtransmit their collective movement to themultiplying lever 22, As best shown in Fig. 2the multiplyinglever 22isfulcrumed adjacent one extremity by means of an inerted knife edgepivot 24 engaging the bearing25 carried by the lower cross bars 11, andis connectedintermediate its ends to the lower extremity of the'metallic rods 21.

Preferablyfthe connection of the rod 2l'with the multiplying lever 22 iscomparatively closeto the fulcrum pivot 24: of said lever andrelatively" distant from the 'free exextent, I preferably connect'thcfree end of the lever 22' with a lower multiplying lever 26 by means ofa link 27 engaging knife edge' pivots 28 and 2'9 onlthe upper and lower'trernity of thelever, whereby a relatively great multiplicatioiigiseffected. Moreover, to increase the multiplication'to any desiredpreferably placed comparatively close to the fulcrum pivot 31andrelatively far from the free extremity of the lower -multiplyingYleveru By properlypositioning theintermediate pivots on the multiplyinglevers 22 and26 any desired degree of multiplication [can beobtainechwhereby a relatively small movement of the thermostat rods willimapart a relativelygreatmovement to'the'fr'ee extremity of the lowermultiplying lever 26.

Upon the free extremityof the lowermultiplying lever'26 isarranged apair of spaced bracket arms 32 (note Fig. 6) in which is j'ournaled tlieshaft 33 ofan adjusting roller of theperiphery of the roller-3l and issecured; thereto a't'its extremity, whereby 'ro-' tation of theroller'34 in theproper direction will shorten or lengthen the effectivelength I of the. ribbon between the roller34 and the controlling leverof the; valve 28; Means for rotating the rol-ler34; to effect desiredadjustments 'isbestshownin Figs; 6and7. 'An adjusting arm-36 is-fixedupon oneextremity of the shaft 33 and carries a pointer 37*movable overa graduated plate '38 fixed u on one of the'brackct arms 32. Rotation Yof the bracketarm 36in either direction will 3 move the pointer over thegraduations on the plate 38 and simultaneously rotate the roller 3% tochangethe effective length of the rib Q mum themetallic bars of thethermostat will expand and their aggregate movement will movementfixediupon the bracket arm 32 of the lower perature 1S seventy-fivedegrees F. Accord- .ingly the position assumed by the i-pointer 3'7 andgraduated plate 38- will be that shown in Fig. 7. The temperature of theroom Wlll now be automatically maintained at substantially thistemperature. Vhenever the temperature rises above the desired -maxi-' bemultiplied through the, levers QZand 26 andthen imparted ,to theribbon35 to lower ,68"ada;pted to receive'the down turned trernity 69 of thelocking lever 70 whereby aanymlesired adjustment of the effective lengthofth'e ribbon 171:1) be maintained.

the hook 46 and. itscontact collar 50, asec ond collar member 46 on thehook lfi then engaging the lever "arm 49 of the valve to swing itdownwardly a distance proportional to the descent of the ho'ok46 topartially close the valvefvl. This lessens the amount of fueladmitted tothe 1 burner 7 and so causes ailesser amount of heat to he trans--mitted to the room 9. Tliereupon the tem perature oftheroom willgraduallylo ver,

and in so doing will cause the metallic bars of the theri'i'iostat to'againicontact to effect a lifting movement upon the. contact collar 10.This alternate lifting and lowering of the contact collar 50 to swingthelever. arin l9 of thevalveto open or closethe'valve 54 will serve tokeep the'temperature in the. room 9 very close toithe; desiredtemperature indicated on the graduated plate 38. Should a differenttemperature be desired within the and then looked in the new. posi-,means of the set screw 39.] This of the adjusting arm SGWchanges theeffective length 'ofthe ribbon 35,,asheretion by 'inbefore described;and thus changes ';the

heightof the contact collar 50.1 Thecollar 50 may also be ad usted uponthe shank of the hook so as to make corrections for,

anvacci'dcntal changes in length'of the ,rib-

hon, wear upoiithe pivots of the thermostat levers etc. 1 l i i After soshortens the effective length of the ribbon that the collar swings thelever army 49 to the maximum height permitted, the: Stop member 90secured'onthe valve casingwill prevent further IHQVBIllGllt-AOf thelever, arm, but furthermovement :of'the r bbon 351s permitted becausethe "spring- 44 will stretch to accommodate I the additional ribbontravel. 1

In Figs. I haveshown' a slightly invention modified embodiment of mywherein a single multiplying lever 63 1s arranged to beqmov'ed by the:collectivemovement of thethermostat 8}, and a different periphery ofthe roller ti lagainst the the contraction of the therinostatinentroller 6% is mounted on thesaine shaft .that carries theZl-ClJllSlllDQ lOllBlQdic to which the upper extremity of the ribbon 35'issecure, and upon the adjusting roller 64 is *secure djoneextremity-of a metallioadjustmg ribbon 65,.theopposite extremity ofwhich is secured to coil spring-66. The" ribbon 65 is preferably woundaround the lna j or portion 1 of the periphery of the roller (Sat sothat movement of tho ribbon 65 will Serve to lota't-e'theroller 64:;'lhegraduated gdisc 67; is? also fixed upon the shaft 83 and carriesin-its periphery; a series ofnotches Aiknob 71 is also secured upontheshaft '83? to permit manual rotationc of the shaft and attachedmembers to. change the adjustment of, the ribbon whenever desired.vllnis,-;when itiiS desiredtoi'change the adjustment so that the,temperature of the room a'vill'be maintained atsay sixty-fivedegrees'inst'ead of at say seventy degrees, the knob'71 is grasped inone hand and theend '69 of the lockinglever lifted with the vother handto free it from the peripheral notches ofv the disc 67 ,The knob-anddiscare now rotated in tl'ieproper direction until thenumeral G5 registers"with a fixed indiCator/TZ whereupon the projecting end 69 of thelockinglever is permitted to fall into thelproper peripheral notchGSonthe disc 67.5 During the rotation of lthe knob 71..

the iribb'on X55 hasbeen wound in,

on the ofrthe coil spring 66, so that the spring remains I under tension3 as long as; the disc 67 and assoc ated partsjare maintained in the newposit on. i

7 Means are also provided for automatically changing the temperatureback to say i "seventy degreesat any desired time of the I day. This isparticularly useful when it is' bdesir'ed to maintaina' relatively lowtemperature throughout the bu'ilding at' night and then T3186 thetemperature of the build ing before the occupantsthereof arise. 7 To,accomplish this the alarm clock 73 is arrangedjliwith its clapper 174'in contact with one. arm ofthe locking lever 7 0 (Note Fig. -"18),1andset so that the alarm mechanism will operate to oscillate the clapper atthe desired time for the change of temperature within the dwelling. Whenthe alarm mechanism goes off the oscillating clapper v will alternatelyraise and lowerthedownwardly projecting extremityllit) of the lockinglever to first lift suchp'rojecting end from the peripheral notch (58 iwherein it had been seatedand' then permit itto rest upon the hon 35. 3A-set screw 39is arranged between the bracket arm 36 and plate 38' .to,lock the arm in any adjusted position The ribbon 35 is adapted to passfrom the fadjustingroller '34 carriedby the thermos" stat lever 26 toadjacent'the valve 23..As illustrated in Fig. 1-, one or more pulleysmay be utilized to change the direction of movement of t-heribbon 35asneeded to perhang plumb adjacent the valve'28. In-the to' again changethe movement from the mit the lower'extrem'ity of the ribbon toillustrated embodiment one pulley 40' is arranged to change thedirection of movement of the ribbon 35 from the vertical tof thehorizontaljand another pulley 41 is arranged horizontal t'othe vertical.It willbeunden stood that this showing is only for purposes ofexemplification, and that'as many pulleys maybe utilized as arenecessary; One'o't these pulleys is illustrated in Figs. 14 and 15, andit will be noted thatthe ribbon is arranged so that it engages orleavesthe supporting members.

,srruction the pulley can also be ut lizedto change the angular travelofthe r1bbon35 pulley in direct alignment with one of the openings 42whereby the pulley bracket 43 is secured to the joists of thebuilding orother By virtue of this conwhile maintaining the ribbonin 'firinengagement with the periphery of the roller."

Thus, When the opening 4:2'is arranged-in direct alignment with theribbon the pulley bracket 43' can be'swung onthefsecub mg member passingthrough the open1ng42 as a-centerfto change the angular travel of theribbon as it passes from the "pulley.

WVhen the desired angle has/been securedadl 35 is maintained ina tautverticalposition [and a pull exerted upon the entire eif'ective lengthoftheribbon to takeup any slack.' ness that may be caused therein bythedown;

ditional securing members are'then fastened through the remainingopenings: in "the pulley bracket. a a The lowerextremity of theribbon 35is secured toa coilspr'ing 445 as 'bytheclam'p 4.5 (note Fig. 9)}and tothe.lower extremity K of the spring 44 is suspended a hook {t6adaptedto(carry a' removable weight-47 whereby the-lower extren'iity oftheribbon 'ivard movement of the free extremity of the l'i'i'iul'tiplying lever 26. The sh'a'nlrl 'of the hook 47 passes throughan elongatedslot 48 in'the valve actuating lever arm 49 (note Fig. 1O)'and'a collar'50 is adjustablysecured uponisaid shank, as by theset-screw'51, to contact the lower face of the arm: 49 [Whenever the movementof'the ribbon 35 under the control of the thermostat brings the collarinto engagement with the lever arm. The lever, arm [49 extends radialtvfrom a collar or hubportion 52 pinned or] otherwise secured upon theshaft 53 to V which is also secu'redthel valve 54, as'by the materialpassing through the valve casing. The valve/5 14s herein'shown ascomprising a body member depending from the shaft [andcarry ng a seatengaging 1301131011" 54 so that the positionof the seat engaging portionrelatively to the body portion of the d olivniv a rd swinging movementof the lever 'pletely close, even when the contact collar moves belowthe lever arm 49 because of the expansive movements of the "thermostat.

As herein shown the stop member 58 'is' threaded into a bracket 59extending laterally from thevalve'casing lock nuts'6O being arranged tolock thejstop member in any adjusted position.=rAecordingly, theposition of the stop member may beset so as topermit theingress ofsufficient gas or other iuel through the valve 54 to maintain a pilotlight adjacent the burner '7 when the lever arm 49 restsupon the'upperextremity of the valve maybe 'adjust'edflatwvill. It' willbe Iunderstood, llO'WGVQI', that other 7 forms of,

valve constructions are useful with my in- -vei 1t'ion. I: preferably.provide a stop meniher-58 (note Figsz'9 and 13) to; limitthe HUD 4950iillal the valve 54 cannot comi stop member-.58. A coil spring Glmayalsobe arrangediarouiid the stop member 58 to cushion the lever arm: andvalve and also a impart an initial'impetus tocthe. valve arm whencontactediby 3 the collar? 50 during the upward movement of the'con'trol 'mechanism becausejof contraction of the thermostat. Aweighted;arm g62'may also bean 'rangedconethe lvalve; shaft 53 tocounteract a the Weight-ofthe'lever arm 49 and maintain the valveassembly :in substantially balanced pos ition,-Whereby avery'slightmovement of g the control.- mechanism is needed to move the valve ineither direction. y a

The operation of'my'improved mechanism is believed'to be apparent.'Thethermostat 8 isisituated in any'vdesiredroom of a dwellporous screenor grating. .The temperature jcomplishi thisthe thermostat isconnected 'withv the valve through the multiplying levers '22 and 26,ribbon 35. and Weighted book 46; carrying-the 001mm I adapted toengagethe lever arm t9of the valve. Preliminarilytheeitective length ofthe ribbon is-adjusted so that the valve will admit sufficient fueltomaintain theairv in-the room 9 substantially at a predeterminedtemperature. This adjustment jcanbe effected either bymeans of theclamp45 .or 'the adjusting roller 34. 'The graduated: plate.3 8 is thenwing and may 'be-fcovered; if desired, by

of the room will tl'iereupondetermine the "amount of "fuel admittedthrough the valve i 23 to the burner 7 in the furnace 5. To aciperiphery of the dist- '67 When the pre-g jet i g a d t hl k ve s :ii ad; from s'pe ph r lnot h 68 h sp ing; ,6" Will" be" relieved from (itstension and eon-v, tract. Inso doing it -vv i:ll1 unwind the 11011 65from the roller (il and turn such roller andthe shaft 33? upon. whichit; is fixed until some stop is engaged to prevent furthermovement ofthe shaft 33? and its attached elements I preferably provide suohrstopbyfixing upon the outer ed e of the di c 67,

anaadjustable stop mem er 75%;Which is clamped at the registration onsthe disc 67 corresponding to theftemperature.which it v is desired forthe interior of lthendwelling during theday. In Fig; this stop memebers.75 has been clamped' upon the. disc 67 in registration with theindication there: on, and aceordinglwthe turning movement of" the shaft.33% and .assooiated parts will be; stopped heneyer, the clamp ,75engages against thepermanently fixed 31 0p menuber 72, in which positionthe ribbon 35? is,

adjusted to maintain the temperaturewithe in the building atseventydegrees. Byal- 1 tering the position of the adjustable stop 7 5any desiredtemperature can be main-f tained' Within the building afterthe alarm clock has acted to lift the locking lever 70 from itsengagement with the p erip heralv notch 68 in ivhich fithas previously.been seated. This provic les a very simple and effective means oftmaintaining {one tempera.

ture at night and another. during theyday,

and it is vonly necessarytomanually rotate. the knob 71 to bring thedesired peripheral notch 68 below the projecting end 69in the lockinglever and wind,tlie alarin clock when 1 the lowering of the 1temperature is 1 desired.

While it vwill be apparent 3 that; ,the.;i1lustrated embodiments 'ofmyinvention herein disclosed are-Well staloulated to adequately fulfillthe objects and advantages primarily;

stated, it is to be; understood that the ,invention is susceptibleto,variation,modification and change Within therspiritjand scope of thesubjoinedl-claims, i i

Haying described my invention; 51 claim:

1 A heat regulator fonbuildings inelud ing a burner, a valve arranged to;co ntro1 the admissionof fuel: to the burner, an operating arinsecuredadj acent one extremity ,to the; :valve and having a slot-in itsfree extremity; a thermostat, a multiplying lever mounted to be actuatedthereby, ,a flexible member suspended from the, "lever, 1 and .a Ieighted contact member v carried by the flexible memher and extendingthnoughthe slotof :said

operating arm, whereby the: contact member and operating armgwillr bemoved ,to vary the position of the valve-in accordance With thealterations of vlength of the; thermostat 2. A heat regulator-1forybuildingsinolud-i ing a burner, a :valve arranged toicontrol theadmission: of fuel ;to..:the '.burner,-an, operate.

sa e te da i e o ei x remityxt s he a nd having a; i et in itsfifr y, amos ats m ltip ying l r ounted t b a at d he eby, 4 i i-fl x b emberspend d fr m-th e ee a We -i imme m mbe car ed by t e fle bl 1 mb r an-ex nd n t rewh t e i f on e We hted mem er-mangl d eemtact v 'w lewerta 10f th eperet g a t' er y he eenmct membe a d peratin m wi l"i bemoved to vary the position of the valve in 1 a cordan e w h al e a ens ole g f thethermostat. i 1 C I i 3. A heat regulator. for, buildingsinplud ing a burnena valve arranged to control the s admission ot'ifuelto theburner, anoperating I arm secured adjacent one extremity to thevalve and ha g a s in s e xtr m yi a thermostatpa multiplyinglevermounted toi be actuated thereby, a flexible member susfi pendedMfrom I the lever, a" weighted 1contact member-harried .by the flexiblemembenand arm secured adj aeent one extremity to the tvalve and havinga: slotiinwitsiiree extrem ty, ""F a a thermostat a nultiplylng lever;mounted V to be actuated thereby, a flexibleimeinber suspended from (the:lever, a veighted' contact member carried, by the flexible-memben and:extending through the slot of. said oper-.; 5 r

atin-g arm, Whereby the contactmember and operating armqwillibe (movedtoo-vary I disposition of the .Valveunaccordance with thelalterationsotlengthuof the thermostat;

and means ca'rriedibyl the multiplying lever; 19

for adjustingthe efieotive length of the ;fiexiblelilember s IfifiAwaheat. regulator for {bllljldingsllicllldinga burner, valvearranged-to control the admission of fuel to theiburnen-anzoperating1 5arm secured adjacent ,one lextreinity to the valve andihaving a slotinfits :free extremity, atherniostat, a multiplying lever mounted to beactuated thereby, :a Qflexible member suspended irom the lever, aweightedgcontadt member carried by i the flexible member and extendingthrough the ,slotzof said operating arm; whereby :the contactinelnbertand :operz atingarm will,beimovedto'svary lthe posi-i tion ofthe {valve in accordance wwith the alterations: of length 1,025 the.thermostat, means married by the multiplying leverfor adjusting theeffective length ofithe flex'ible memberv including roller journa led'ion the lever j and zsecured at eits. periphery :tomthei flexiblemembenand means for rotating the roller to wind or unwind the flexiblemember on the periphery of the roller." 6. A heat-regulator forbuildings including-a burner, a valve arrangedto control the admissionof fuel to the'burner, an operatmg arm secured ad acentone extremityto-the valve and having a slot in its. free extremity, a thermostat, amultiplying lever mounted-to be actuated thereby, a flexible membersuspended from the lever,'and a weighted icontact member carried by theiiexib'le member and extending through] the slot of said operating arm,whereby the con tact member and operating arm will be movedto; vary theposition of the valve in I accordance with the alterations (of-length ofthethermostat, there being a CQll spring interp'osed'in the flexiblemember between the multiplying leverand weighted contact member. A

7. A heat regulator for-buildings includ ing {a-burner, valve arrangedto control I the admission otfuel tothe burner, an operating-arm securedadjacent one extremity to the valveand having a slot in its free,

extremity, a thermostat, a multiplying lever mounted to beactuatedthereby, a flexible member suspended from the lever, aweight- Ied contact member carried by'the flexible member and extending throughthe slot of said operating arm,v whereby the contact member'andoperating arm will be moved to vary the position-of the valvein'accordance with thealterations of length of the thermostat,and'mea'ns for limiting the movement or the'operatmg arm in eitherdirection.

- to the valve and having a slot 'in its free extren'iity, athermostat,a multiplying. lever mounted to be actuated thereby, a flexiblemembersuspended from the lever, a we1ght-.

ed contact membercarried bythe flexible member and extending through theslot of said operating arm, whereby the contact member and operating armwill be moved to vary the position ofthe valve in accordance withthealterations of length .of the thermostat, and a pair of stop memberscarried by the valve in positionto:limit'the:

movement of the operating arm :in either direction. 1

9. A heat regulator for buildings ing a burner, a valve arranged tocontrol the admissionof fuel to the burner, a thermostat mounted at" a Idistance from the' burner and comprising a-plurality of metallic barsand pivoted levers connecting the ends-ofiadjacent barsto transmit" theexpansive or contractive movements of one bar to thenext,-amultiplyinglever arranged to' be actuated-by the metallic bars-[of the the secondmultiplyingleverwith the valve" 8. A heat re'gulatorfor buildingsinclud- I mg a'burner, a valve arranged to 'control'the admission "offuel to the "burner, an oper-f atingarm secured adjacent one extremitythermostat, a second multiplying lever hav :mg anfinverted pivotfulcrumed upon the frame, connectionsbetweenthe multiplying levers and aflex ble member 'connectmg to vary the positionof the valve in accordance with the'alt'erations ot-length [of the thermostat. f l 1 10; Aheat regulator for buildings inclu'ding burner," a valve arranged tocontrol the admissiongof fuelto' the burner,a ther-* mostat mounted at adistance fttroin the burner and comprising 'a plurality of metallic barsand. pivoted-levers connecting the ends of adjacent barsl'to transmitthe expansive or contract ve' movements of one bar to the next,a'multiplymg le'verarranged j to be'actuated by the metallic barsof thethermostat," a '7 second multiplying lever hav-j ing an inverted pivotfulcrumed upon the frame, connections between the multiplying levers aflexible member connecting the.

second multiplying lever with the valve to vary the position of thevalve in accordance with the alterations oflength ofthe' thermostat, andmeans mounted upon the second multiplying lever for adjusting theeltective lengtli of the'flexible member.

11.. A heat regulator'for buildings including a burner, a valve arrangedto control the admission of fuel to the burner, a thermo stat mounted ata distance'from the burner and comprising a plurality of metallic barsand pivoted leversconnecting the ends of adjacent bars to transmit theexpansive or contractive movements olt one bar tothe next, a

the free extremity of said leverand connected at; its periphery with theflexible member,and means for rotating the roller to wind or unwind theflexible member upon 12. A heat regulator for buildings in cludingaburner, a val've arranged to con trol the admission of fuel'to theburner and having an operating arm, a thermostat,"a

multiplying lever mounted to be actuated thereby, a *flexible membe'rarranged "be-' tween the lever and theoperating arm of the valve,-andmeansfor varying the effective length of theflexib'le member includ ingroller -journaled' upon the lever and connected at its. periphery to the-flexible member, means i for rotating; the. roller, in

